![Reservoirs, Rainwater and the Big Island of Hawaii](https://cole-tpomag.imgix.net/https%3A%2F%2Fwww.tpomag.com%2Fuploads%2Fimages%2Ft10.jpg?crop=focalpoint&fit=crop&fp-x=0.5&fp-y=0.5&h=620&ixlib=php-1.1.0&q=75&w=1024&s=ab87be626b42692f3ed62782829eb6d3)
Ancient civilizations collected rainwater for drinking. That practice continues even today on the Big Island of Hawaii, where rainwater is a major source of drinking water for more than 10,000 people on the island’s northern tip.
At the Waimea Water Treatment Plant, water...